Disazo dye.



BEST AVAILABLE COPY UNITED STATES PATENT OFFICE.

KURT DEBAMARI, O1 ELBEBFELD, AND ARTHUR ZART, OF VOHWINKEL, GERMANY, ABBIGNORS TO FARBENFA'BRIKEN VORM. FRIEDR. BAYER 6t 00., OF ELBERFELD, GERMANY, A CORPORATION OF GERMANY.

DISAZO DYE.

1,052,136, Specification of Letter: Patent. Patented Feb, 4, 1913, Ne Davin]. Application tiled July 27, 1011. Serial No. 640,780.

To all whom it may concern: aminophenyl 5 oxy 2 nuphtimxnzol- 7-sulfonic acids:

a jo-cna-nu.

Be it known that we, Kun'r Dnsaamm and Aarmm Zarrr, doctors of philosophy, chemista, citizens of the German Empire, reside ingi respectively, at Elberfeld, Germany, an Vehwinkel, near Elberfeld, Germany, have invented new and useful Improvements in New Diaazo Dye, of which the following is a specification.

The present invention relates to the manufacture and production of new azo coloring matters havin most probably the following phpnyl 5 oxy 2 nnphthotluazelgeneral forum a: 7 -sulfome flCldB:

R meanin a derivative of the Q-amino-IS- naphthol- -sulfonic acid containing a heteronuclcar ring:

:3 Z':: 0|el1 O-0dh-Nlh X meaning --NH, which may be replaced by "-0-, and

The new dyes are with the 5.5'-dioxy-2.2'-dinaphthyianiin- 7.7'-d1aulionie acid:

hbtained by combining (MR the diam com ounda prepared om aminou,

phcanyl-lS-oxynapht limidazol 7 sulfonic :30 ac: a:

-0cUr-Nlh E ii son: an

, Of course two diil'erent molecules of those as com ounds can be used.

T e new dyes having most probably the formula:

7e areafter dried and ulverized in the soluble in water; yieldigg1 u on reduction shape of their alkaline ea ta dark powders with atannous chlorid an y rochloric acid a derivative of 2-amino-5-naphthcl-7-suh fonic acid containing a heteronuclear ring:

s n 5 s) on and a compound of the formula:

soar an ear 1 0 an as.

i I a s dyeing cotton from red to bluish-red shades ie which on being developed with diazotized para-nitranilin change into shades fast to is in the shape of its sodium salt a darlc powder which is easily soluble in water with an a reddish-violet coloration and which is soluble in concentrated sulfuric acid with a bluish-red coloration. U on reduction with stannous chlorid and hyt roehloric acid it is split up into 2-para-nminophenyl-ti-oxy-1.2- 49 naphthoxazol-T-sulfonie acid and the 0.0!- diamino 2.2 dinsphthylamin MS' diexy- 7.7f.-disu1foaic acid. It dyes cotton violet.i in; developed with di-,

Thqsh'ade after be azotizcd pars-nitranilm is red-violet fast to 41s wpshing. It can be discharged to a pure w iite.

Meta-aminophenyl derivatives of the above mentioned heteronuelear compounds of 2.5.7- aminonaphthol sultonie acids can be used.

We claim 1. The herein described new disazo dyestufl's having most probably the formula:

where R and R, are derivatives of 2-aminowhich is after being dried and ulverized- 1n the shape of its sodium sat a dark washing and capable of being discharged to n. are white. I

lhe following example may further illustratethe invention, the parts being by' weight:-76O parts (2 mol.) of para-annnop mnyl-b-oxy-LQ-na hthoxazol-j' sulfonu: acid are diazotized witi 140 )arts of sodium nitrite and hydrochloric acid and combined with 401 parts of 5.5-dioxy-2.2-dinaphthylamin-7-7-disulfonic acid containing an excess of bicarbonate of sodium. After some time the mixture is heated and the dye is' salted out with common salt, filtered oil and dried.

The new dye having most probably the formula:

K --BO|ll 5-nnphthol-7-sulfonic acid containing heteronuclear rin .,which are after beingdricd and pulverizei in the shape of their alkaline saltsdark powders soluble in water yielding upon reduction with stannons chiorid and hydrochloric acid a derivative of Q-amiuo-finaphthol 'i-sulfonic acid containing a hoteronuclear ring and a compoun .of the formula:

The herein describe new dye having most probably the formula:

/BOsll a powder soluble in concentrated sulfuric acid with a bluish-red coloration; yielding upon til) reduction with StfihIlOUSChlOIid and hydro- In vtestimony whereof We have hereunto 10 'chloric acid para-aminophenyl-5-oxy-12:' set our hands in the presence of two subhaphth0xaz01-7-su1f0nic' acid and 6.6-discribing witnesses.

amino 2.2 dinaphthy'lamin -7 .7 '-disu1fon'1c 1 acid, dyeing cotton yiolet, which'shade after KURT DESAMARI' being developed with diazotized para-.ni- ARTHUR ZART' tranilin is-red-violetfast to washing which Witnesses:

can be discharged-t0 a pure White, substan- ALBERT F. NUFER,

tially as described. Lem BEUKMANN. 

